Question

Difference Between Roasting and Calcination ( Need 5 miximum ) with example

Answer 1

© Roasting : It is the process of converting an ores to oxide by strongly heating it in the presence of excess of air . For example sulphide ores are converted into their respective oxide by heating in the presence of air.

eg : 2 ZnS +3O2 -------->  2 ZnO + 2SO2 .

© Calcination : It is the process of converting an ores to oxide by strongly heating it in limited air . For example carbonate ores are converted into the oxide by heating in the absence of air.

eg : ZnCO3 -----> ZnO + CO2

Answer 2

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